diff --git a/Machines/AppleII/Video.cpp b/Machines/AppleII/Video.cpp
index f1cd5f4b1..11051188d 100644
--- a/Machines/AppleII/Video.cpp
+++ b/Machines/AppleII/Video.cpp
@@ -20,7 +20,7 @@ VideoBase::VideoBase(bool is_iie, std::function<void(Cycles)> &&target) :
 	crt_->set_composite_sampling_function(
 		"float composite_sample(usampler2D sampler, vec2 coordinate, vec2 icoordinate, float phase, float amplitude)"
 		"{"
-			"return clamp(texture(sampler, coordinate).r, 0.0, 0.7);"
+			"return clamp(texture(sampler, coordinate).r, 0.0, 1.0);"
 		"}");
 
 	// Show only the centre 75% of the TV frame.
diff --git a/Outputs/CRT/Internals/Shaders/OutputShader.cpp b/Outputs/CRT/Internals/Shaders/OutputShader.cpp
index 8f3687fab..bad5bc1d5 100644
--- a/Outputs/CRT/Internals/Shaders/OutputShader.cpp
+++ b/Outputs/CRT/Internals/Shaders/OutputShader.cpp
@@ -83,7 +83,7 @@ std::unique_ptr<OutputShader> OutputShader::make_shader(const char *fragment_met
 
 		"void main(void)"
 		"{"
-			"fragColour = vec4(pow(" << colour_expression << ", vec3(gamma)), 0.8);"//*cos(lateralVarying)
+			"fragColour = vec4(pow(" << colour_expression << ", vec3(gamma)), 0.64);"//*cos(lateralVarying)
 		"}";
 
 	return std::unique_ptr<OutputShader>(new OutputShader(vertex_shader.str(), fragment_shader.str(), {